Cousin Bo
Well-Known Member
I've always heard it was bad to dim HID bulbs. Supposedly it changes the spectrum and is harder on the bulb.
How many watts do I need
- Thread starter meerkat67
- Start date
That’s fair chat too. I’ll go grab some 400w hps.. then I’ll just dim the ballast back to 400w
amneziaHaze
Well-Known Member
where are you getting 28C.at the tops or bottom/ top of tent
have thermometer sitting at canopy level
Billy the Mountain
Well-Known Member
The PAR map for a single 600w HPS doesn't even cover a 4'x4' (1.5 m^2) very well.
Three in an 8' x 8' would be worse.
interesting, if that’s the case. What would you recommend putting in there? For the most even coverage for 14 plants/watts. Could be open to LED options too.. could you recommend a HID option that would be best then LED 2mx2mx2m area.
Fallguy111
Well-Known Member
If you want the most even coverage I’d recommend bar style leds. I’m preferring quantum boards because I can keep them high and more room at light level for fans. But for more even ppfd my bar light nails it.
amneziaHaze
Well-Known Member
You can try a diy it can get a lot cheaper and its not that hard to make.some new leds can produce 3g/w now
amneziaHaze
Well-Known Member
With some co2 you should be be able to go to 35c in theory
Billy the Mountain
Well-Known Member
Unless you have a compelling need for heat instead of light, an LED fixture would be a far better choice than an HPS light.
Technology marches on.
amneziaHaze
Well-Known Member
I would think thats the stuff he allready has nobody is buying new hps now
Can you post a photo of bar LED? I know next to nothing about them. Also, what watt of the equivalent would I need in that size tent to be sufficient?
Fallguy111
Well-Known Member
I can’t seem to find an LED that will cover 2mx2m.. all they seem to cover is 1.5m max… do you think I’ll need something else alongside this?
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Fallguy111
Well-Known Member
There’s many bar style leds. I’d say you’re shooting for 1600watt to max out your tent. So 2 800’s. I’ve run (aglex) Chinese bars and hlg qb’s. Both great and I don’t really see much difference.
Just means you replace the bulbs faster
joesoap2013
Well-Known Member
1 thing Ida wished was using a parabolic reflector with a 600w hps way sooner it defo upped my yield
But the weed under the smallishish reflector was quality sht
Always seemed the best weed grew directly under the reflector
But the weed under the smallishish reflector was quality sht
Always seemed the best weed grew directly under the reflector
What ppfd should I be after at the canopy?
amneziaHaze
Well-Known Member
900-1500 depending on co2 levels